To link to the entire object, paste this link in email, IM or documentTo embed the entire object, paste this HTML in websiteTo link to this page, paste this link in email, IM or documentTo embed this page, paste this HTML in website

9. Follower of Verrocchio, Madonna and Child
Oberlin
ical and chemical properties of ultramarine. Natural and artificial ultramarine, which are similar chemically, are distinguished by visual recognition of particle size and character. In this specimen both appeared
to be present. Unless an unusually finely ground natural ultramarine
was confused with artificial ultramarine, this evidence points to a 19th
centurv date because artificial or French ultramarine was not produced
until 1828 by Guimet.
Specimens taken at (4) are representative of the red tone in the
upper left background. A cross-section shows a blue like that in specimens (1) and (2) underlying a layer of red ochre.
The present unpainted appearance of the relief is only its latest
modification. Paint appears to have been applied on several occasions
separated by long stretches of time. Paint also appears to have been
140

9. Follower of Verrocchio, Madonna and Child
Oberlin
ical and chemical properties of ultramarine. Natural and artificial ultramarine, which are similar chemically, are distinguished by visual recognition of particle size and character. In this specimen both appeared
to be present. Unless an unusually finely ground natural ultramarine
was confused with artificial ultramarine, this evidence points to a 19th
centurv date because artificial or French ultramarine was not produced
until 1828 by Guimet.
Specimens taken at (4) are representative of the red tone in the
upper left background. A cross-section shows a blue like that in specimens (1) and (2) underlying a layer of red ochre.
The present unpainted appearance of the relief is only its latest
modification. Paint appears to have been applied on several occasions
separated by long stretches of time. Paint also appears to have been
140

List of Illustrations

Follower ot Verrocchio, Madonna and Child. Oberlin

Identifier

AMAM_Bulletin_019_003_0034.tif

Rights

For research and educational use only. For all other uses please contact Allen Memorial Art Museum